Captain Walter "Wattie" Pukauae Barclay, MM, QSM, (19 January 1894 – 12 November 1985) was a New Zealand rugby union player, sports administrator and military officer.

Barclay is the grandfather of master voyager and co-chair of the national coordinating committee for the Tuia 250 Encounters programme Hoturoa Barclay-Kerr CNZM.

[2] With the outbreak of World War I, Barclay served on the Western Front and played for the New Zealand Māori Pioneer Battalion rugby team.

Returning to Dannevirke after World War I, Barclay, along with his brothers Glen and Frank were prominent players for the Aotea Rugby Club, which dominated the Southern Hawke's Bay competition.

[3] Barclay's involvement in the Hawke's Bay provincial team - of which he was the Vice Captain - led to some controversy, most notably in the Ranfurly Shield match against Wairarapa at Masterton in 1927, which came to be known as the Battle of Solway.

The New Zealand Rugby Football Union ruled that Barclay was not properly qualified and though Hawke's Bay had won the match, the game and the Ranfurly Shield was awarded to Wairarapa.

Most notably he selected the New Zealand Māori Rugby Teams that played South Africa in 1965 and in the Prince of Wales Cup Challenge in Wellington in 1967.

Barclay continues to hold the record for the highest number of tries scored for the New Zealand Māori Rugby Team with 40 career tries.

[1] Alongside his brother Frank, Barclay served with the New Zealand Māori Pioneer Battalion in World War I.